Drill pipe protector



April 12, 1932. w. L. McLAlNE ET AL 1,853,915

DRILL PIPE PROTECTOR Filed Sept. 20, 1929 RICHARD A.SPERRY WILLIAM L. MQLAINE //v NTORS 1244 6d. MM

A TTOR V Patented Apr. 12, 1932' WILLIAM MCLAINE A1tTD RICHARD CORPORATION OF CALIFORNIA B a PAINT s ice-1] 1 A.- sPERiaY, on 'Los Amenities. CALIFORNIA, As- SIGNORS or oNE-Tnmnro E. M. sMIT COMPANY, or LOS ANGELES, CALIFORNIA. IA 7 imrLnrrrn rno'r'noroa Application filed September 20, 1929; Serial no. 393,990.

Our invention pertains to the art of rotary well drilling and specifically to the protection of drill pipe and tool joints from chafing against the casing within which they are s raised, lowered and revolved during the drill-- ing of a well. V

The object of our'invention is to provide a protective band which can be readily and quickly placed around a drill pipe without 10, springing it over the tool joints, which can be economically manufactured and which will be durable and will retain its predetermined position on the pipe. 1

' Our. improved protector consists substan 15. tially of a band of sheet metal with an interlocking joint at each end, the metal being relieved at suitable intervals'to allow for the projection of rubber knobs or knobs'of other elastic material supported by cotton or other 20 suitable fabric.

A preferred manner of constructing our improved protector is illustrated in the attached tion thereof, in which, I

Fig. 1 is a cross section of a protector extended in a straight line,

Fig. 21s a plane View of Fig. 1,.and,"

Fig. 3 is a side elevation of aprote'ctor placearound a portion of pipe shown in sec;

' The second advantage'is that the protector tion.

301 I V V, I

Referring to the drawings; 10 is astrip of .steel or other s'uitable'thinfmetal, at the op-* posite ends of which are formedthe loops 11 for insertion of the locking pin 12. In this- 85 l strip of metal we form the openings 13 Whichpreferably have upturned edges as indicated at 14:. r w,

011 the lower ofleft hand side of this strip we place a band 15 "composed ofsoft -rubber or of an elastic rubber compound, in v which is 'embe-dded'several plies of string woven fabric 16, a suitable material being the fabric used in the manufacture of aut-omobile tire casings. On the opposite side of this band and projecting through the open ings 13 we form knobs of rubber 17 and carry the fabric into the bodyof these knobs as ,in-

dicated at 18. The rubber and fabric knobs should projectbeyond the metallic strip for a sufficient distance to allow material wear drawings and the following descripmade up into stands. The third advantage is r that by the use-of projecting lugs, ofrubber the cross sectional area of aprotector of any given. diameter is reduced by" the amount of] ducing restriction of the circulation of drill-- from the ends ofthe knobs beforepthemetal of the strip comes in contact with the wall of the pipe. I We would suggest a projection beyond the upturned'edge 14 'of say A inch== for a protector to fit a four inch pipe, of inch for eight inch pipe, and a corresponding ly greater projection for larger sizes. "The" greater-the projection the longer will bethe' lifeof the fitting, but it is not feasible to make smallknobs of toogr'eat a height, as knobs not having a sufiicient base in proper tion with their height have a tendency to roll over and tear off instead of wearing smoothly from their upper surface. Y The length of the strip must be such that when it is wound around the pipe indicated at 19in Fig, 3, the pin 12 may be inserted through the openings in the loops 11'. This insertion should berpossible only when the strip is drawn very tightly around'the pipe be placedincom'pression to keep the fitting from revolving 'onthe pipe.-

O-urimproved fitting has three major advantages over the'solid rubber'rin'gs heretofore used; The first advantage is that the fabric insertion and the metallic; strip surrounding the band givesita high degree of permanence asit will. not stretch and loosen.

breaking any joints, which is of vmaterial.

importance. when the drill pipe is already.

free space leftbetween the lugs, thus re--' ing mud. This advantage alone is. of great importance in drilling deep holes, where 1 casing of small diameter'mu'st often be'used.

' WVhile we prefer to construct our improved} fitting with fabric in the p'rojecting knobs as above described, we obtain. material ady vantages by the use of thestructure shown, even when the fabric insertion is omitted, and wish toclaim as-{broadly as the state of the; artwill permit apipe protector having knobs so'that the inside of the rubberband 16 may or lugs or rubber or its equivalent projecting through openings in a metallic band.

While we have disclosed a protector in which the projecting knobs are rectangular in form and occupy a large part. of. the Width of the band, we donot restrict ourselves to any particular form of knob, but may use knobs of a round, square, or other shape and may use a relatively small number-or a multipli'cityof knobs We claim as our invention:

1. A pipe protector comprising: a metallic band; means for conjoining the ends of said band; openings through saidband, and knobs of resilient material retained within said band and. projecting. through; said openings.

A pipeprotector comprising: a metallie band means for conjoining the ends of said band; openings through said band, a strip-10f resilient material placed on the inner side of. said band, and projections integral with. .said rubber strip extending throughv said openings.

3'. A pipe protector comprising: a. metallic band means for conjoining the ends of said band; openings through said band; a laminated strip of layers of resilient material and fabric placed within said band, and knobs of resilient material projecting from said strip through. said. openings.

L. A pipe protector comprising: a metallie band means for conjoining. the:- ends of said band; openings through said band; a laminated of layers of resilient materialandfabric placed within said band, and knobs of resilient material having said layers of fabric incorporated therein projecting from said strip andthrough. said open-- mgs.

5 A pipe protector comprising: a metallicband; means for conj'oi-ningt the ends of.

said band; openings through said band, and

knobs of rubber retained within said. band and projecting through said: openings;

6. A. pipe protector comprising:- a metallicyband; means for conj'oining the ends of said band: openings through said band, a strip: of rubber placed on the inner side of said band, and projections integral with said rubber strip extending through said open- 1IlgS.-

'7'. A pipe protector comprising": a metallic band;- means for con joining the ends of said band;- openings-tl'irough said band; a laminated" strip of layersof rubber and fabric placed within said band, and knobs of rubber projecting from said strip through said open 1ngs.

8'. A pipe protector comprising: a metall'ic band means for conjoiningthe ends of said" band openings through said band; a laminated strip of layers of rubber and fabric placed within said band, and knobs of rubber having said layers of fabric incorporated therein projecting from said strip and through said openings.

9. A pipe protector comprising: a metallic band having openings therein; means for conjoining the ends of said band; and. wear receiving bodies retained Within said band and projecting through said openings.

10. A pipe protector comprising: a metallic band having openings therein; means for conjoining the ends of said band; a supporting strip onthe inner side of said band; and wear receiving bodies on said supporting strip and projecting through said openings.

11. A pipe protector for use in a well, comprising: a cylindrical supporting member adapted to surround said pipe, said supporting member having openings therein; and Wear receiving bodies retained Within said openings and projecting through said openings in position to engage the wall of the well.

12. A pipe protector for use in a Well, com-- prising: a cylindrical supporting member adaptedrtosurround said pipe, said supporting member having openings therein; a wall of resilient material within said supporting member and adapted to be held against said pipe by said supporting member; and wear receiving bodies projecting from said wall and out through said openings into positions for engagement with the Wall of the well.

13. A pipe protector of the character described, including: a curved wall adapted to fit the exterior of said pipe, said Wall having a plurality of spaced wear receiving bodies projecting radially therefrom; and clamping means for securing; said wall to said drill pipe comprising a circular member adapted to fit around said wall and having means therewith for constricting the circular member on said. wall so as to compress said wall against said pipe.

14. A pipe protector of the character described, including: a wallof' resilient material adapted to fit the exterior of said pipe, said wall having a radially projected wear receiving. portion; and clamping means for securing said wall to said drill pipe comprising a circular member adapted to fit around said wall and having'means therewith for constricting the circular member on said. wall so as to compress said wall against said 1 e. V P fn witnessthat we claim the foregoing we have hereunto subscribed our names this 10th day of September, 1929.

WILLIAM L. MoLAIN E. RICHARD A. SPERRY. 

